A multi-way valve driven by a servo motor

Abstract

The present invention discloses a multi-way valve driven by a servo motor, comprising a valve body and a driving assembly, wherein the driving assembly is arranged on one side of the valve body, the valve body is provided with a plurality of hydraulic oil ports, and the valve body is provided with a valve cavity communicated with the corresponding hydraulic oil ports, a valve core is slidably provided in the corresponding valve cavity in the valve body, and the valve core is used to switch the connection state between the hydraulic oil port and the valve cavity by sliding, and the driving assembly comprises a stator and a rotor, wherein the stator is arranged outside the rotor, the lower end of the rotor is a crank structure, the rotor and the valve core are connected by a connecting rod, one end of the connecting rod is rotationally connected to the lower end of the rotor, and the other end of the connecting rod is rotationally connected to one end of the valve core, and the rotor can drive the valve core to slide through the connecting rod. The present invention provides a multi-way valve driven by a servo motor, which can perform reversing switching more accurately and improve switching efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of hydraulic valves, and in particular to a multi-way valve driven by a servo motor. Background Art

[0002] As a core component of hydraulic and fluid control systems, the reliability and response speed of channel switching of multi-way valves directly affect the overall performance of the system. In the existing technology, some multi-way valve designs do not integrate independent driving mechanisms, and require the use of external actuators (such as cylinders, motors) to indirectly drive the valve core. In addition, existing multi-way valves mainly adopt a horizontal setting structure, which also leads to a more complex structure, increased system complexity, and larger installation space when the external actuator is connected for driving. In addition, the transmission path of the external driving force is long and the accumulated error of the mechanical clearance is large, making it difficult to achieve precise control of the valve core displacement, which can easily cause poor channel sealing or inaccurate flow regulation.

[0003] Based on the above-mentioned defects of the prior art, the switching reliability, energy efficiency ratio and integration of the existing multi-way valve under complex working conditions are difficult to meet the needs of modern industrial equipment for efficient and precise fluid control. Summary of the invention

[0004] The object of the present invention is to provide a multi-way valve driven by a servo motor, which can perform directional switching more accurately and improve switching efficiency.

[0005] The technical solution adopted by a multi-way valve driven by a servo motor disclosed in the present invention is:

[0006] A multi-way valve driven by a servo motor comprises a valve body and a drive assembly, wherein the drive assembly is arranged on one side of the valve body, the valve body is provided with a plurality of hydraulic oil ports, and the valve body is provided with a valve cavity connected with the corresponding hydraulic oil ports, a valve core is slidably provided in the corresponding valve cavity in the valve body, and the valve core is used to switch the connection state between the hydraulic oil port and the valve cavity by sliding, the drive assembly comprises a stator and a rotor, the stator is arranged outside the rotor, the lower end of the rotor is a crank structure, the rotor and the valve core are connected by a connecting rod, one end of the connecting rod is rotatably connected to the lower end of the rotor, and the other end of the connecting rod is rotatably connected to one end of the valve core, and the rotor can drive the valve core to slide through the connecting rod.

[0007] As a preferred embodiment, the drive assembly includes a shell and a control module, the control module is arranged above the shell, the control module is sealed and connected to the shell, the stator and rotor are arranged inside the shell, the upper end and the lower end of the rotor are rotatably connected to the inner wall of the shell, and the shell is fixed to one side of the valve body, and the shell is connected to the valve cavity inside the valve body.

[0008] As a preferred solution, both upper and lower ends of the rotor are rotatably connected to the inner wall of the housing by bearings.

[0009] As a preferred solution, the valve body includes a first joint, a reversing joint and a cover, which are sealed and connected in sequence, the valve chamber and the valve core are both arranged in the reversing joint, and the drive assembly is arranged corresponding to the reversing joint, and the drive assembly is connected to the reversing joint.

[0010] As a preferred solution, the hydraulic oil port includes a P port, a T port, a working A port and a working B port. The P port and the T port are both arranged on one side of the first joint, and are connected to the valve cavity in the reversing joint. The working A port and the working B port are arranged at the upper end of the reversing joint and are connected to the valve cavity in the reversing joint.

[0011] As a preferred solution, the valve chamber includes an oil inlet chamber, an oil return chamber, a working A chamber and a working B chamber, the lower ends of the working A chamber and the working B chamber are respectively communicated with the two ends of the oil return chamber, the valve core is provided with two first valve plates corresponding to the oil return chamber, the first valve plates adjust the connection state of the oil return chamber with the working A chamber and the working B chamber by sliding, the valve core is slidably arranged in the oil inlet chamber, the oil inlet chamber is communicated with the P port, a first communicating chamber is arranged at the periphery of the oil inlet chamber, the oil inlet chamber is communicated with the first communicating chamber, second communicating chambers are respectively provided on both sides of the first communicating chamber corresponding to the working A chamber and the working B chamber, and the upper and lower ends of the first communicating chamber and the second communicating chamber are maintained in communication, the valve core is provided with a second valve plate corresponding to the lower end of the first communicating chamber and the second communicating chamber, the lower ends of the first communicating chamber and the second communicating chamber are always kept in a blocked state by the second valve plate, and the second valve plate is used to control the connection state of the second communicating chamber with the working A chamber or the working B chamber, and the mechanical interlocking of the oil circuit is realized by the phase difference movement of the first valve plate and the second valve plate.

[0012] As a preferred solution, a one-way valve is provided at the connection point between the first communicating chamber and the upper ends of the second communicating chamber, and the one-way valve is used to limit the hydraulic oil in the second communicating chamber from flowing back into the first communicating chamber.

[0013] As a preferred embodiment, the first connecting cavity is arranged in an N-shaped structure outside the oil inlet cavity, both sides of the oil inlet cavity are connected to the first connecting cavity, and the valve core is provided with a third valve plate at the connection between the oil inlet cavity and the first connecting cavity.

[0014] As a preferred solution, a return spring is provided at one end of the valve core away from the drive assembly.

[0015] As a preferred solution, the number of the reversing links is at least one, the oil inlet chambers of several of the reversing links are connected in series, the oil return chambers of several of the reversing links are connected in series, and the number of the driving components corresponds to the number of the reversing links.

[0016] The beneficial effects of a multi-way valve driven by a servo motor disclosed in the present invention are as follows: the stator and rotor of a driving assembly are integrated on one side of a valve body to form an integrated driving assembly; through the linkage cooperation between a crank structure at the lower end of the rotor and a connecting rod, the rotor rotates and pulls the connecting rod to deflect while the valve core is restricted by the valve body and cannot rotate, so that the connecting rod drives the valve core to slide, and directly converts the rotational motion into precise linear sliding of the valve core, which can perform switching more accurately and improve switching efficiency, eliminates the need for external actuator intervention, and realizes a highly integrated switching mechanism; the crank-connecting rod transmission structure breaks through the traditional horizontal sliding limitation, completes the valve core switching control in a limited space, significantly reduces the redundant space occupancy and improves the immediacy and reliability of the switching, meeting the structural optimization requirements of a compact multi-way valve under complex working conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of a multi-way valve driven by a servo motor according to the present invention.

[0018] Figure 2 The present invention is a schematic diagram of a reversing connection structure of a multi-way valve driven by a servo motor.

[0019] Figure 3 The present invention is a schematic diagram of a valve core structure of a multi-way valve driven by a servo motor.

[0020] Figure 4 It is a cross-sectional view of an initial state of a multi-way valve driven by a servo motor according to the present invention.

[0021] Figure 5 It is a cross-sectional view of the connection state between the T port and the working A port of a multi-way valve driven by a servo motor according to the present invention.

[0022] Figure 6 The present invention is a sectional view of the T port and the working B port of a multi-way valve driven by a servo motor. DETAILED DESCRIPTION

[0023] The present invention will be further described and illustrated below in conjunction with specific embodiments and accompanying drawings:

[0024] Please refer to Figure 1 and Figure 4A multi-way valve driven by a servo motor includes a valve body 10 and a drive assembly 20. The drive assembly 20 is arranged on one side of the valve body 10. The valve body 10 is provided with a plurality of hydraulic oil ports, and the valve body 10 is provided with a valve cavity connected with the corresponding hydraulic oil ports. A valve core 30 is slidably provided in the corresponding valve cavity in the valve body 10. The valve core 30 is used to switch the connection state between the hydraulic oil port and the valve cavity by sliding. The drive assembly 20 includes a stator 21 and a rotor 22. The stator 21 is arranged outside the rotor 22. The lower end of the rotor 22 is a crank structure. The rotor 22 and the valve core 30 are connected by a connecting rod 25. One end of the connecting rod 25 is rotatably connected to the lower end of the rotor 22, and the other end of the connecting rod 25 is rotatably connected to one end of the valve core 30. The rotor 22 can drive the valve core 30 to slide through the connecting rod 25.

[0025] The driving component 20 includes a housing 23 and a control module 24. The control module 24 is arranged above the housing 23. The control module 24 is sealed and connected to the housing 23 and is responsible for controlling the rotation angle of the driving component 20. The stator 21 and the rotor 22 are arranged inside the housing 23. The upper and lower ends of the rotor 22 are rotatably connected to the inner wall of the housing 23 by bearings to ensure smooth rotation of the rotor 22, so that the stator 21 and the rotor 22 form a servo motor structure. The forward and reverse rotation of the rotor 22 and the electronic rotation angle are controlled by powering on.

[0026] The control module 24 can also adopt an external structure, and the control module 24 and the valve body 10 are set separately, which can avoid the valve body 10 being affected in some harsh working environments. The service life of the control module 24 is also affected. It also includes an angle sensor, a photoelectric encoder, etc. for detecting the rotation angle of the rotor, so that the movement amount of the valve core 10 can be obtained through conversion, which plays a role in more accurately controlling the sliding distance of the valve core 10.

[0027] The outer shell 23 is fixed to one side of the valve body 10, and the outer shell 23 is connected to the valve cavity inside the valve body 10, so that when the hydraulic oil enters the valve body 10, it can simultaneously enter the outer shell 23, and because the hydraulic oil always keeps flowing, the heat on the surface of the stator 21 and the rotor 22 can be taken away by the hydraulic oil, which plays a role in heat dissipation for the rotor 22 and the stator 21.

[0028] The valve body 10 includes a first joint 11, a reversing joint 12 and a cover 3, which are sealed and connected in sequence. The valve chamber and the valve core 30 are both arranged in the reversing joint 12, and the drive component 20 is arranged corresponding to the reversing joint 12, and the drive component 20 is connected to the reversing joint 12.

[0029] The hydraulic oil ports include a P port 111, a T port 112, a working A port 121 and a working B port 122. The P port 111 and the T port 112 are both arranged on one side of the first link 11, and are communicated with the valve cavity in the reversing link 12. The working A port 121 and the working B port 122 are arranged at the upper end of the reversing link 12, and are communicated with the valve cavity in the reversing link 12.

[0030] Therefore, when the multi-way valve is installed and used, the working port A 121 and the working port B 122 are connected to the corresponding working parts, such as the input port and output port of the hydraulic cylinder, respectively, and the hydraulic oil is introduced into the valve body 10 through the oil inlet, and the hydraulic oil is circulated in conjunction with the oil return port.

[0031] Please refer to Figure 2 and Figure 3 The valve chamber includes an oil inlet chamber 14, an oil return chamber 15, a working A chamber 16 and a working B chamber 17. The lower ends of the working A chamber 16 and the working B chamber 17 are respectively connected to the two ends of the oil return chamber 15. The valve core 30 is provided with two first valve plates 31 corresponding to the oil return chamber 15. The first valve plates 31 adjust the connection state of the oil return chamber 15 with the working A chamber 16 and the working B chamber 17 by sliding. The valve core 30 is slidably arranged in the oil inlet chamber 14. The oil inlet chamber 14 is connected to the P port 111. The outer periphery of the oil inlet chamber 14 is provided with a first connecting chamber 18. The oil inlet chamber 14 is connected to the first connecting chamber 18. The first connecting chamber 18 is provided with a split valve on both sides. A second connecting chamber 19 is respectively provided corresponding to the working A chamber 16 and the working B chamber 17, and the upper and lower ends of the first connecting chamber 18 and the second connecting chamber 19 are kept connected. A second valve plate 32 is provided at the lower end of the valve core 30 corresponding to the first connecting chamber 18 and the second connecting chamber 19. The lower ends of the first connecting chamber 18 and the second connecting chamber 19 are always kept in a blocked state by the second valve plate 32, and the second valve plate 32 is used to control the connection state of the second connecting chamber 19 with the working A chamber 16 or the working B chamber 17. The mechanical interlocking of the oil circuit is realized through the phase difference movement of the first valve plate 31 and the second valve plate 32.

[0032] In order to ensure that the valve core 30 can slide, and the valve core 30 is arranged in the oil inlet chamber 14, a through groove is provided which passes through the oil inlet chamber 14, and the valve core 30 is slidably connected to the through groove, so that the through groove connects the lower ends of the oil inlet chamber 14, the first connecting chamber 18 and the second connecting chamber 19, and therefore, the corresponding connection is controlled by the first valve plate 31 and the second valve plate 32 on the valve core 30.

[0033] The working A chamber 16 and the working B chamber 17 are respectively arranged on the left and right sides of the oil inlet valve, and the end surface distance of the two first valve plates 31 on one side close to each other is equal to the distance between the working A chamber 16 and the working B chamber 17, and the length of the first valve plate 31 is greater than the width of the oil return chamber 15.

[0034] Please refer to Figure 4Specifically, when the valve core 30 is in the initial state, the two first valve plates 31 are correspondingly blocked at the connection between the working A chamber 16 and the working B chamber 17 and the oil return chamber 15; the length of the second valve plate 32 is greater than the width of the second connecting chamber 19, so that in the initial state, the two ends of the second valve plate 32 are correspondingly blocked at the lower ends of the first connecting chamber 18 and the second connecting chamber 19, and the second connecting chamber 19 and the working A chamber 16 and the working B chamber 17 are all in a blocked state. At this time, the liquid in the multi-way valve is in a state of being unable to communicate, which is the initial state.

[0035] Please refer to Figure 5 When the valve core 30 moves to the left, the first valve disc 31 corresponding to the working A chamber 16 moves away from the working A chamber 16, so that the oil return chamber 15 is connected with the working A chamber 16, and the second valve disc 32 moves toward the working A chamber 16, so that the second connecting chamber 19 and the working A chamber 16 are blocked by the second valve disc 32 to form an interlock. At this time, the T port 112 is connected with the working A port 121; and the first valve disc 31 corresponding to the working B chamber 17 moves toward the working B chamber 17 to block the oil return chamber 15 and the working B chamber 17, and the second valve disc 32 moves away from the working B chamber 17 to connect the second connecting chamber 19 with the working B chamber 17, so that the hydraulic oil in the oil inlet chamber 14 enters the first connecting chamber 18, enters the second connecting chamber 19 through the upper end of the first connecting chamber 18, and then enters the working B chamber 17 to form an interlock. At this time, the P port 111 is connected with the working B port 122.

[0036] Please refer to Figure 6 When the valve core 30 moves to the right, the first valve plate 31 corresponding to the working A chamber 16 moves toward the working A chamber 16 to block the oil return chamber 15 and the working A chamber 16, and the second valve plate 32 moves away from the working A chamber 16 to connect the second communicating chamber 19 and the working A chamber 16, so that the hydraulic oil in the oil inlet chamber 14 enters the first communicating chamber 18, enters the second communicating chamber 19 through the upper end of the first communicating chamber 18, and then enters the working A chamber 16 to form an interlock. At this time, the P port 111 is connected with the working A port 121 to form an interlock; and the first valve plate 31 corresponding to the working B chamber 17 moves away from the working B chamber 17 to connect the oil return chamber 15 and the working B chamber 17, and the second valve plate 32 moves away from the working B chamber 17 to block the second communicating chamber 19 and the working B chamber 17 to form an interlock. At this time, the T port 112 is connected with the working B port 122.

[0037] In the above solution, a one-way valve 40 is provided at the connection point between the upper ends of the first communicating chamber 18 and the second communicating chamber 19 , and the one-way valve 40 is used to limit the hydraulic oil in the second communicating chamber 19 from flowing back into the first communicating chamber 18 .

[0038] The first communicating chamber 18 is arranged in an N-shaped structure at the periphery of the oil inlet chamber 14, and both sides of the oil inlet chamber 14 are connected to the first communicating chamber 18. The valve core 30 is provided with a third valve plate 33 at the connection between the oil inlet chamber 14 and the first communicating chamber 18. The third valve plate 33 can follow the sliding of the valve core 30 to control the connection or closure between the two sides of the oil inlet chamber 14 and the lower end of the first communicating chamber 18, so as to control the oil inlet rate, that is, when one side is connected, the other side is blocked.

[0039] A return spring 50 is provided at one end of the valve core 30 away from the driving assembly 20. The return spring 50 exerts additional force on the valve core 30, so that the valve core 30 has better stability when it is reset or moved. At the same time, the return spring 50 can also play a damping role when the connecting rod 25 pushes the valve core 30.

[0040] There is at least one reversing link 12, the oil inlet chambers 14 of several reversing links 12 are connected in series, the oil return chambers 15 of several reversing links 12 are connected in series, and the number of drive components 20 corresponds to the number of reversing links 12, so that according to actual working conditions, multiple groups of reversing links 12 and drive components 20 can be set to connect multiple corresponding external hydraulic equipment, and the reversing of each reversing link 12 can be controlled and switched by the corresponding drive component 20.

[0041] The present invention provides a multi-way valve driven by a servo motor, wherein a stator 21 and a rotor 22 of a driving component 20 are integrated on one side of a valve body 10 to form an integrated driving component 20, and through the linkage cooperation between a crank structure at the lower end of the rotor 22 and a connecting rod 25, the rotor 22 rotates and pulls the connecting rod 25 to deflect, while the valve core 30 is restricted by the valve body 10 and cannot rotate, so that the connecting rod 25 drives the valve core 30 to slide, and directly converts the rotary motion into the precise linear sliding of the valve core 30, which can more accurately perform switching and improve the switching efficiency, eliminate the intervention of an external actuator, and realize a highly integrated switching mechanism; the crank connecting rod 25 transmission structure breaks through the traditional horizontal sliding limitation, completes the switching control of the valve core 30 in a limited space, significantly reduces the redundant space occupation and improves the immediacy and reliability of the switching, and meets the structural optimization requirements of a compact multi-way valve under complex working conditions.

[0042] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention, rather than to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the essence and scope of the technical solution of the present invention.

Claims

1. A multi-way valve driven by a servo motor, characterized in that: The invention comprises a valve body and a driving component, wherein the driving component is arranged on one side of the valve body, the valve body is provided with a plurality of hydraulic oil ports, and the valve body is provided with a valve cavity communicated with the corresponding hydraulic oil ports inside the valve body, a valve core is slidably provided corresponding to the valve cavity inside the valve body, and the valve core is used to switch the connection state between the hydraulic oil port and the valve cavity by sliding, the driving component comprises a stator and a rotor, the stator is arranged outside the rotor, the lower end of the rotor is a crank structure, the rotor and the valve core are connected by a connecting rod, one end of the connecting rod is rotatably connected to the lower end of the rotor, and the other end of the connecting rod is rotatably connected to one end of the valve core, and the rotor can drive the valve core to slide through the connecting rod. The drive assembly includes a shell and a control module, the control module is arranged above the shell, the control module is sealed and connected to the shell, the stator and rotor are arranged inside the shell, the upper end and the lower end of the rotor are both rotatably connected to the inner wall of the shell, and the shell is fixed to one side of the valve body, the shell is connected to the valve cavity inside the valve body, the upper and lower ends of the rotor are rotatably connected to the inner wall of the shell by bearings, the valve body includes a first joint, a reversing joint and a cover, the first joint, the reversing joint and the cover are sealed and connected in sequence, the valve cavity and the valve core are both arranged in the reversing joint, and the drive assembly is arranged corresponding to the reversing joint, and the drive assembly is connected to the reversing joint.

2. A multi-way valve driven by a servo motor as claimed in claim 1, characterized in that: The hydraulic oil port includes a P port, a T port, a working A port and a working B port. The P port and the T port are both arranged on one side of the first joint and are connected to the valve cavity in the reversing joint. The working A port and the working B port are arranged at the upper end of the reversing joint and are connected to the valve cavity in the reversing joint.

3. A multi-way valve driven by a servo motor as claimed in claim 2, characterized in that: The valve chamber includes an oil inlet chamber, an oil return chamber, a working A chamber and a working B chamber. The lower ends of the working A chamber and the working B chamber are respectively communicated with the two ends of the oil return chamber. The valve core is provided with two first valve plates corresponding to the oil return chamber. The first valve plates adjust the connection state of the oil return chamber with the working A chamber and the working B chamber by sliding. The valve core is slidably arranged in the oil inlet chamber. The oil inlet chamber is communicated with the P port. A first communicating chamber is arranged at the periphery of the oil inlet chamber. The oil inlet chamber is communicated with the first communicating chamber. Second communicating chambers are respectively provided on both sides of the first communicating chamber corresponding to the working A chamber and the working B chamber, and the upper and lower ends of the first communicating chamber and the second communicating chamber are kept in communication. The valve core is provided with a second valve plate corresponding to the lower end of the first communicating chamber and the second communicating chamber. The lower ends of the first communicating chamber and the second communicating chamber are always kept in a blocked state by the second valve plate, and the second valve plate is used to control the connection state of the second communicating chamber with the working A chamber or the working B chamber. The mechanical interlocking of the oil circuit is realized by the phase difference movement of the first valve plate and the second valve plate.

4. A multi-way valve driven by a servo motor as claimed in claim 3, characterized in that: A one-way valve is provided at the connection point between the first communicating chamber and the upper end of the second communicating chamber, and the one-way valve is used to limit the hydraulic oil in the second communicating chamber from flowing back into the first communicating chamber.

5. A multi-way valve driven by a servo motor as claimed in claim 4, characterized in that: The first communication cavity is arranged in an N-shaped structure at the periphery of the oil inlet cavity. Both sides of the oil inlet cavity are connected to the first communication cavity. The valve core is provided with a third valve plate at the connection between the oil inlet cavity and the first communication cavity.

6. A multi-way valve driven by a servo motor as claimed in any one of claims 1 to 5, characterized in that: A return spring is arranged at one end of the valve core away from the driving assembly.

7. A multi-way valve driven by a servo motor as claimed in any one of claims 1 to 5, characterized in that: The number of the reversing links is at least one, the oil inlet chambers of a plurality of the reversing links are connected in series, the oil return chambers of a plurality of the reversing links are connected in series, and the number of the driving components corresponds to the number of the reversing links.

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